1  #ifndef Py_INTERNAL_DTOA_H
       2  #define Py_INTERNAL_DTOA_H
       3  #ifdef __cplusplus
       4  extern "C" {
       5  #endif
       6  
       7  #ifndef Py_BUILD_CORE
       8  #  error "this header requires Py_BUILD_CORE define"
       9  #endif
      10  
      11  #include "pycore_pymath.h"        // _PY_SHORT_FLOAT_REPR
      12  
      13  
      14  #if _PY_SHORT_FLOAT_REPR == 1
      15  
      16  typedef uint32_t ULong;
      17  
      18  struct
      19  Bigint {
      20      struct Bigint *next;
      21      int k, maxwds, sign, wds;
      22      ULong x[1];
      23  };
      24  
      25  #ifdef Py_USING_MEMORY_DEBUGGER
      26  
      27  struct _dtoa_state {
      28      int _not_used;
      29  };
      30  #define _dtoa_interp_state_INIT(INTERP) \
      31      {0}
      32  
      33  #else  // !Py_USING_MEMORY_DEBUGGER
      34  
      35  /* The size of the Bigint freelist */
      36  #define Bigint_Kmax 7
      37  
      38  #ifndef PRIVATE_MEM
      39  #define PRIVATE_MEM 2304
      40  #endif
      41  #define Bigint_PREALLOC_SIZE \
      42      ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
      43  
      44  struct _dtoa_state {
      45      /* p5s is a linked list of powers of 5 of the form 5**(2**i), i >= 2 */
      46      // XXX This should be freed during runtime fini.
      47      struct Bigint *p5s;
      48      struct Bigint *freelist[Bigint_Kmax+1];
      49      double preallocated[Bigint_PREALLOC_SIZE];
      50      double *preallocated_next;
      51  };
      52  #define _dtoa_state_INIT(INTERP) \
      53      { \
      54          .preallocated_next = (INTERP)->dtoa.preallocated, \
      55      }
      56  
      57  #endif  // !Py_USING_MEMORY_DEBUGGER
      58  
      59  
      60  /* These functions are used by modules compiled as C extension like math:
      61     they must be exported. */
      62  
      63  PyAPI_FUNC(double) _Py_dg_strtod(const char *str, char **ptr);
      64  PyAPI_FUNC(char *) _Py_dg_dtoa(double d, int mode, int ndigits,
      65                          int *decpt, int *sign, char **rve);
      66  PyAPI_FUNC(void) _Py_dg_freedtoa(char *s);
      67  
      68  #endif // _PY_SHORT_FLOAT_REPR == 1
      69  
      70  #ifdef __cplusplus
      71  }
      72  #endif
      73  #endif /* !Py_INTERNAL_DTOA_H */